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Is the “struct hack” technically undefined behavior?
...n the above trick for getting the right size, you might also need to put a union containing every simple type before the array, to ensure that the array itself begins with maximal alignment rather than in the middle of some other element's padding. Again, I don't believe any of this is necessary, bu...
Arduino101（Genuino 101）&App Inventor – RGB LED控制 - 创客硬件开...
...tps://blog.cavedu.com/2017/02/ ... %e6%8e%a7%e5%88%b6/
本文將介紹如何取得觸碰點的 RGB 參數之後透過 BLE 送給 Arduino 101 來點亮 RGB LED。
App InventorDesigner使用 Canvas 來取得觸碰點座標。兩個連線斷線用的按鈕：Btn_Connect / Btn_DisConnec...
Environment variables in Mac OS X
...g the change. If I set a variable as an ordinary user, it's not visible to root (via sudo) and vice-versa.
– Andrew
Feb 18 '11 at 11:11
...
Permission denied (publickey) when SSH Access to Amazon EC2 instance [closed]
...r admin on some Debians, according to Bogdan Kulbida's answer)(can also be root, fedora, see below)
Trying to connect the wrong host. Is that the right host you are trying to log in to?
Note that 1. will also happen if you have messed up the /home/<username>/.ssh/authorized_keys file on you...
Get the current displaying UIViewController on the screen in AppDelegate.m
...
You can use the rootViewController also when your controller is not a UINavigationController:
UIViewController *vc = self.window.rootViewController;
Once you know the root view controller, then it depends on how you have built your UI, bu...
iOS 6: How do I restrict some views to portrait and allow others to rotate?
... around but this is great solution. i add CustomNavigationController in my root view controller and give support according to my needs. Thanks once again.
– Bhavin_m
May 25 '13 at 12:17
...
Pass ruby script file to rails console
...
Here's the hack I'm using:
rr() {
rails_root="$(bundle exec rails runner "puts Rails.root")"
rp="$(relpath "$1" "$rails_root")"
bundle exec rails runner "eval(File.read '$rp')"
}
relpath() {python -c "import os.path; print os.path.relpath('$1','${2:-$PWD}')...
Eclipse secure storage
...Indigo installed the folder org.eclipse.equinox.security is hidden in the /root/.eclipse folder.
Do a
sudo su
cd /root/.eclipse
mv org.eclipse.equinox.security org.eclipse.equinox.security.backup
Then (re)start eclipse and the password will be gone.
...
How to avoid reinstalling packages when building Docker image for Python projects?
...from -r requirements.txt (line 1))
Running setup.py (path:/tmp/pip_build_root/pytest/setup.py) egg_info for package pytest
....
Cleaning up...
---> bf5c154b87c9
Removing intermediate container 08188205e92b
Step 4 : ADD . /srv
---> 3002a3a67e72
Removing intermediate container 83defd1851d0
Ste...
How to import an existing X.509 certificate and private key in Java keystore to use in SSL?
...-out server.p12 -name [some-alias] \
-CAfile ca.crt -caname root
Note: Make sure you put a password on the pkcs12 file - otherwise you'll get a null pointer exception when you try to import it. (In case anyone else had this headache). (Thanks jocull!)
Note 2: You might want to add...